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seesaw

Posted: Mon Nov 18, 2019 11:40 pm
by JChen_2I
Are the angles of a seesaw molecule 90 and 120 degrees? Or should they be slightly less than 90 and 120.
The textbook answer key says it should be 90 and 120 exactly, but shouldn't the lone pair repulsion cause the angles to be slightly smaller?

Re: seesaw

Posted: Mon Nov 18, 2019 11:41 pm
by Leila_4G
Hi! I think it is less than 90 degrees and 120 degrees.

Re: seesaw

Posted: Mon Nov 18, 2019 11:57 pm
by Natalie Wang 1B
I asked my TA, and he said that the angles will be less than 120 and 90.

Re: seesaw

Posted: Tue Nov 19, 2019 12:14 am
by Avnita C_4B
Due to the repulsion of the lone pairs, they should be less than 90 and 120.

Re: seesaw

Posted: Tue Nov 19, 2019 12:11 pm
by Adelpha Chan 1B
JChen_3C wrote:Are the angles of a seesaw molecule 90 and 120 degrees? Or should they be slightly less than 90 and 120.
The textbook answer key says it should be 90 and 120 exactly, but shouldn't the lone pair repulsion cause the angles to be slightly smaller?

they should be slightly less than 90 and 120 degrees as the lone pair causes the angle to be less and not 90 and 120 degrees exactly

Re: seesaw

Posted: Tue Nov 19, 2019 1:10 pm
by Heba Mengesha 3D
The repulsion of the lone pairs will cause the bond angles to be slightly less than 90 and 120 degrees.